High-resolution photoemission study of low-Tc superconductors: Phonon-induced electronic structures in low-Tc superconductors and comparison with the results of high-Tc cuprates

T. Yokoya; A. Chainani; T. Kiss; S. Shin; K. Hirata; N. Kameda; T. Tamegai; T. Nishio; H. Uwe

doi:10.1016/S0921-4534(02)01389-8

High-resolution photoemission study of low-T_c superconductors: Phonon-induced electronic structures in low-T_c superconductors and comparison with the results of high-T_c cuprates

T. Yokoya
, A. Chainani
, T. Kiss
, S. Shin
, K. Hirata
, N. Kameda
, T. Tamegai
, T. Nishio
, H. Uwe

Department of Physics

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Recent advances in the energy resolution and cryogenic techniques used in photoemission spectroscopy have enabled us to directly observe the superconducting electronic structure of superconductors with a relatively lower transition temperature (low-T_c). In this paper, we report photoemission results on low-T_c superconductors measured with an ultrahigh-resolution low-temperature photoemission spectrometer. The result of Nb₃Al exhibits a superconducting gap and a phonon-induced peak-dip-hump structure characteristic of the strong-coupling superconducting spectral function. From measurements of Ba_0.67K_0.33BiO₃, we observe isotropic s-wave superconducting gap opening below T_c as well as depletion of intensity near the Fermi level above T_c, which can be attributed to a phonon-induced pseudogap. We will compare these photoemission results with those of high-T_c superconductors.

Original language	English
Pages (from-to)	97-101
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	378-381
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0921-4534(02)01389-8
Publication status	Published - 2002 Oct 1

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/S0921-4534(02)01389-8

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Yokoya, T., Chainani, A., Kiss, T., Shin, S., Hirata, K., Kameda, N., Tamegai, T., Nishio, T., & Uwe, H. (2002). High-resolution photoemission study of low-T_c superconductors: Phonon-induced electronic structures in low-T_c superconductors and comparison with the results of high-T_c cuprates. Physica C: Superconductivity and its Applications, 378-381(PART 1), 97-101. https://doi.org/10.1016/S0921-4534(02)01389-8

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title = "High-resolution photoemission study of low-Tc superconductors: Phonon-induced electronic structures in low-Tc superconductors and comparison with the results of high-Tc cuprates",

abstract = "Recent advances in the energy resolution and cryogenic techniques used in photoemission spectroscopy have enabled us to directly observe the superconducting electronic structure of superconductors with a relatively lower transition temperature (low-Tc). In this paper, we report photoemission results on low-Tc superconductors measured with an ultrahigh-resolution low-temperature photoemission spectrometer. The result of Nb3Al exhibits a superconducting gap and a phonon-induced peak-dip-hump structure characteristic of the strong-coupling superconducting spectral function. From measurements of Ba0.67K0.33BiO3, we observe isotropic s-wave superconducting gap opening below Tc as well as depletion of intensity near the Fermi level above Tc, which can be attributed to a phonon-induced pseudogap. We will compare these photoemission results with those of high-Tc superconductors.",

author = "T. Yokoya and A. Chainani and T. Kiss and S. Shin and K. Hirata and N. Kameda and T. Tamegai and T. Nishio and H. Uwe",

note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science and Culture, Japan. T.K. thanks JSPS for financial support.",

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doi = "10.1016/S0921-4534(02)01389-8",

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Yokoya, T, Chainani, A, Kiss, T, Shin, S, Hirata, K, Kameda, N, Tamegai, T, Nishio, T & Uwe, H 2002, 'High-resolution photoemission study of low-T_c superconductors: Phonon-induced electronic structures in low-T_c superconductors and comparison with the results of high-T_c cuprates', Physica C: Superconductivity and its Applications, vol. 378-381, no. PART 1, pp. 97-101. https://doi.org/10.1016/S0921-4534(02)01389-8

High-resolution photoemission study of low-T_c superconductors: Phonon-induced electronic structures in low-T_c superconductors and comparison with the results of high-T_c cuprates. / Yokoya, T.; Chainani, A.; Kiss, T. et al.
In: Physica C: Superconductivity and its Applications, Vol. 378-381, No. PART 1, 01.10.2002, p. 97-101.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - High-resolution photoemission study of low-Tc superconductors

T2 - Phonon-induced electronic structures in low-Tc superconductors and comparison with the results of high-Tc cuprates

AU - Yokoya, T.

AU - Chainani, A.

AU - Kiss, T.

AU - Shin, S.

AU - Hirata, K.

AU - Kameda, N.

AU - Tamegai, T.

AU - Nishio, T.

AU - Uwe, H.

N1 - Funding Information: This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science and Culture, Japan. T.K. thanks JSPS for financial support.

PY - 2002/10/1

Y1 - 2002/10/1

N2 - Recent advances in the energy resolution and cryogenic techniques used in photoemission spectroscopy have enabled us to directly observe the superconducting electronic structure of superconductors with a relatively lower transition temperature (low-Tc). In this paper, we report photoemission results on low-Tc superconductors measured with an ultrahigh-resolution low-temperature photoemission spectrometer. The result of Nb3Al exhibits a superconducting gap and a phonon-induced peak-dip-hump structure characteristic of the strong-coupling superconducting spectral function. From measurements of Ba0.67K0.33BiO3, we observe isotropic s-wave superconducting gap opening below Tc as well as depletion of intensity near the Fermi level above Tc, which can be attributed to a phonon-induced pseudogap. We will compare these photoemission results with those of high-Tc superconductors.

AB - Recent advances in the energy resolution and cryogenic techniques used in photoemission spectroscopy have enabled us to directly observe the superconducting electronic structure of superconductors with a relatively lower transition temperature (low-Tc). In this paper, we report photoemission results on low-Tc superconductors measured with an ultrahigh-resolution low-temperature photoemission spectrometer. The result of Nb3Al exhibits a superconducting gap and a phonon-induced peak-dip-hump structure characteristic of the strong-coupling superconducting spectral function. From measurements of Ba0.67K0.33BiO3, we observe isotropic s-wave superconducting gap opening below Tc as well as depletion of intensity near the Fermi level above Tc, which can be attributed to a phonon-induced pseudogap. We will compare these photoemission results with those of high-Tc superconductors.

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High-resolution photoemission study of low-T_c superconductors: Phonon-induced electronic structures in low-T_c superconductors and comparison with the results of high-T_c cuprates

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